INTRAPOPULATIONAL STRUCTURE OF THE B.N.R. CATTLE REARED IN THE PRIVATE FARMS FROM THE NORTH-EASTERN AREA OF ROMANIA

V. Ujica, Rodica Danaila, V. Maciuc, I. Nistor, St. Creanga

Abstract
The research has been conducted in terms of household and semiintensive operating Black and White Romanian cows from Moldova region. The primary data came from a database of OARZ: Iasi, Bacau, Botosani, Suceava, Vaslui and Vrancea, obtained by control of production, supplemented by direct observations of some personal holdings taken in research.
In the Black and White Romanian cow intrapopulation structure from the specific area 56 genetics groups with more then 10 daughters were indentified. From 56 males used for reproduction, the bulls with the most numerous daughters were: code. 51,111 with 210 daughters, code 51,114 with 112 daughters, 51,131 with 110 daughters, 51454 with 101 daughters and 51112 with 95 daughters.
The medium milk production on these genetic structures reveal us some very valuable genetic families with 6000 kg milk production and over in the first lactation. Similarly, 8 families (14.28%) achieved in the first lactation 6000 kg milk and 26 families (46.42%) over 5000 kg milk. All these genetic structures and those presented above show the genetic value of Black and White Romanian cows from Moldova region.

Key words: cows, Black and White Romanian, intrapopulation structure, genetics groups